Artifacts and disconnect Island - Water Body Ocean

This is a questioned asked by someone in 2024 and not yet answered (That Ive seen) - Basically I created a master level then created a new basic level, I have Water plugin and Landmass plugin enabled - Used Landscape mode to create a landscape with edit layers enabled, then placed a Water Body Ocean in the scene.

As you can see from the image, there is an island but there is also an artifact in the scene - it looks a secondary water body thats floating on top of the main ocean.

Im trying to work out if there is a setting that Im missing

Thanks

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